PubMed Central is a free digital archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health (NIH), developed and managed by NIH's National Center for Biotechnology Information (NCBI) in the National Library of Medicine (NLM).

With PubMed Central, NLM has taken the lead in preserving and maintaining access to electronic literature, printed biomedical literature, scientific studies and their findings and especially many studies on the effects of various ingredients on the human body...